12 THE FLORA OF THE ALPS 
23. MATRICARIA, L. 
Ray-flowers ligulate, white, female, in one row, or O; 
disk-flowers bisexual; anther-cells not tailed; receptacle 
hollow, elongated after flowering; pappus o. Not 
alpine. 
M. Chamomilla, L., Wild Chamomile, with its pecu- 
liar odour; and MM. inodora, L. (Pyrethrum tnodorum, 
Geertn.), distinguished by its want of scent and its very 
narrow leaf-segments; are common weeds in cultivated 
land. 
24. LEUCANTHEMUM, Tourn. 
Ray-flowers ligulate, female, white; disk - flowers 
tubular, bisexual, yellow; involucre usually flat or con- 
cave ; involucral bracts with scarious margins; pappus 
© or a membranous wing; fruit of ray-flowers ribbed, 
of disk-flowers compressed. 
L. vulgare, DC. (Chrysanthemum Leucanthemum, L.), 
Ox-eye Daisy; and L. Parthenium, G. Gr. (Matricaria 
Parthentum, L.), Feverfew, are common lowland plants. 
The following are alpine or sub-alpine :— 
A. Involucre hemispherical; heads corymbose:—L. 
corymbosum, G. Gr.; leaf-segments in 8-I5 pairs, those 
of the upper leaves linear-lanceolate, inciso-dentate ; 
mountain woods; Western Switzerland, Dauphiny, Pyre- 
nees, not common. 
B. Receptacle somewhat concave; capitule solitary ; 
stem nearly leafless:—Z. alpinum, Lam.; stem I-3 in., 
glabrous, upper leaves linear, entire; alpine pastures. 
L. minimum, Vill.; plant small, tomentose, with viscid 
or rough hairs; rare; Zermatt. 
